More like cost-effective analysis for both the bank and the customer. I spent many hours on that Charge Code 76 dispute that I wish I have never taken the route. It is also very irritating when the promised credit did not show up and the disputed amount resurfaced so I had to keep calling that number only having an ext number could go thru but always to the handling agent's inbox and she never returned the calls. Wasted more googling time to finally use the Chase catch-all customer service number to voice my complain - all for disputing a few bucks "in principle". Very much a waste of time / effort and energy.